tailieunhanh - Fabrication of silane-modified magnetic nano sorbent for enhanced ultrasonic wave driven removal of methylene blue from aqueous media: Isotherms, kinetics, and thermodynamic mechanistic studies

In this study, we report a simple and economic one-pot synthesis of magnetite (Fe3O4) nanostructure and its modification with tetraethyl orthosilicate by coprecipitation method. The synthesized (Fe3O4@SiO2 ) nano sorbent was applied for enhanced adsorptive removal of methylene blue by ultrasonic wave driven batch experiments. After successful synthesis, the nanostructure was characterized for their physical structure by FT-IR, VSM, TEM, and XRD. For the maximum adsorptive performance of nano sorbent, various parameters were optimized, such as dose, pH, time, concentration, and temperature. | Turkish Journal of Chemistry Turk J Chem 2021 45 181-191 http chem TÜBİTAK Research Article doi kim-2007-66 Fabrication of silane-modified magnetic nano sorbent for enhanced ultrasonic wave driven removal of methylene blue from aqueous media Isotherms kinetics and thermodynamic mechanistic studies 1 2 1 2 1 Abdullah Esra ALVEROĞLU DURUCU Aamna BALOUCH Ali Muhammad MAHAR 1 National Centre of Excellence in Analytical Chemistry University of Sindh Jamshoro Pakistan 2 İstanbul Technical University Faculty of Science and Letters Department of Physics Engineering İstanbul Turkey Received Accepted Published Online Final Version Abstract In this study we report a simple and economic one-pot synthesis of magnetite Fe3O4 nanostructure and its modification with tetraethyl orthosilicate by coprecipitation method. The synthesized Fe3O4@SiO2 nano sorbent was applied for enhanced adsorptive removal of methylene blue by ultrasonic wave driven batch experiments. After successful synthesis the nanostructure was characterized for their physical structure by FT-IR VSM TEM and XRD. For the maximum adsorptive performance of nano sorbent various parameters were optimized such as dose pH time concentration and temperature. The adsorption mechanism was best fitted by Langmuir isotherm with a maximum capacity of mg g while kinetics best fitted by pseudo-second-order kinetic. The synthesized nano sorbent was successfully applied for enhanced adsorptive removal of toxic methylene blue from aqueous media. The proposed method is promising and effective in terms of simplicity cost operation green energy consumption reproducible excellent reusability and magnetically separability with fast kinetic. Key words Ultrasonic wave Fe3O4@SiO2 methylene blue tetraethyl orthosilicate 1. Introduction Different types of organic and inorganic dyes are designed and used in textile plastics printing and paper industries as colorants 1 . It